Oil filter



June 24, 1952 T, s, LASKY 2,601,404

OIL FILTER Filed April 12, 1950 Ymg,

1N V EN TOR.

Patented June 24, 1952 UNITED STATES PATENT OFFICE OIL FILTER Thomas S.Lasky, Kingston, Pa.

Application April 12, 1950, Serial No. 155,409

4 Claims.

This invention relates to oil filters of the type hown in my U. S.Patent No. 2,487,146, November An object of the present invention is toprovide a filter of the above kind having an improved cartridge adaptedto operate efficiently for a relatively long period of time, andembodying coarse and ne absorbent filtering media which respectivelyafford an initial stage of coarse filtration and high moisture and acidabsorption, and a second stage of fine filtration and low moisture andacid absorption.

Another object is to provide efficient means whereby the oil is causedto rst flow through the coarse filtering medium and then through the nefiltering medium, and whereby the filtering media are prevented fromclogging the oil inlet and outlet perforations respectively provided inthe shell and in the central tube of the cartridge.

Other objects and features of the invention will be apparent from thefollowing description when considered with the accompanying drawing, inwhich:

Figure 1 is a central vertical sectional View of a filter embodying thepresent invention;

Figure 2 is a fragmentary horizontal section taken on the line 2-2 ofFigure 1; and

Figure 3 is a perspective view of the hollow frusto-conical perforatedmember which forms a part of the cartridge.

Referring in detail to the drawing, 5 indicates the cup-shapedimperforated body of a cylindrical casing which also includes a domedcover 6 detachably secured on the top of said body. The bottom 1 of thebody 5 has a central outlet nipple 8 for connection with an oilconducting pipe 9, and said body has a side inlet nipple I forconnection with an oil conducting pipe I I. Aprod or post I2 is fixed atits lower end to the bottom 1 of the body centrally of the latter, andthis rod projects above the top of body 5 and through a central openingin the cover 6. A wing nut I3 is screwed onto the upper end of rod I0and down against the cover 6 to detachably secure the latter on the body5. The lower end portion of rod I2 is provided with an axial passage I4,the lower end of which communicates with the bore of nipple 8, and atransverse passage I5 extends from the upper end of passage I4 to theperiphery of therod I2.

Arranged within the casing is a cartridge which includes a filteringmedia container embodying a cylindrical shell I6 having an imperforateupper portion and provided with screened perforations I1 in the lowerportion thereof, an imperforate bottom wall I8, an imperforate removablelid I9, and a central tube 20 having its lower end fixed or tightlythreaded as at 2| in a central opening of the bottom wall I8 and itsupper end received in a central opening of the lid I9. The lid ispreferably removably screwed onto the upper end of tube 2|! as at 22.The outer surfaces of the bottom wall I8 and the lid I9 are recessed toprovide tapered seats 23 and 24 about the central openings thereof, andthese seats are respectively engaged by the tapered faces of washers 25and 26 snugly fitted on the rod I2 to prevent escape of oil from theends of the tube 20. Near its upper end. the tube 20 is provided withscreened inlet perforations 21 located directly under the lid I9.

A combined oil seal and follower 28 is slidably tted on the rod I 2 anddisposed upon the washer 24, and a helical compression spring 29 isdisposed on said rod between the seal and follower 28 and the casingcover 6 to press the cartridge down against the washer 25 and the washer26 down against the lid I9. Lid I9 preferably has a hinged handle 30 foruse in applying and removing the same.

The lower portion of the container of the cartridge is filled with acoarse absorbent ltering medium 3| which affords an intial stage ofcoarse filtration and high moisture and acid absorption. I have found asunexpectedly eflicient for this purpose commercial mercerized threadcotton waste, which consists of a tangled mass of crin- 'kled threads,which resists ready dense packing of the same, and which has numerouscavities that allow room for expansion upon absorption of water and acidand provide considerable space for reception of solids removed from theoil. The upper portion of this container is substantially lled with afine or dense absorbent filtering medium 32 which affords a second stageof fine filtration and which preferably consists of cotton batting. Thismedium is held away from and prevented from clogging the perforations 21of tube 20 by means of an inverted hollow frustoconical perforatedmember 33 fitted on the upper portion of the tube 20 and resting at itslower smaller end on a resilient washer 34 snugly tted on said tubeimmediately below said perforations. The larger upper end of the member33 engages the under side of lid I9, and the lid presses and holds themember 33 down on the washer 34, so that oil must pass from the medium32 through the perforations of and into member 33 before entering theperforations 21 of tube 20. 'Ihe oil then passes down in tube 20, andthrough passages I5 and M to pipe 9. Obviously, the oil enters thecasing under pressure from pipe l I and fills the space between thecasing and the cartridge, ultimately entering the container of thecartridge through the perforations l1 and flowing upwardly through themedia 3l and 32 before passing into the member 33.

From the foregoing description, the nature and advantages of the presentinvention will be apparent to vand appreciated by those vskilled-intheart. Modicationsand changesy in detailsofconstruction are contemplatedwithin the spirit o the invention as claimed.

Having described the invention, what is claimed as new is: k

1. In an oil filter, a cartridge comprising a container, said containerembodying a cylindrical shell having an imperforateuppen-portion andprovided withperforations in its lowerportion, an imperforate bottomhaving a central opening, ,a vremovable impergorate lid havingwawentralopeningand a centraljtube havingits lower end .xedin the central.opening of` the ,bottom rand itsupper end removably receive-d1 in. thecentral .opening of.k the lid. said v tube havin'gperwforations' nearitsupper endand being otherwise irnperforate, a oarseabsorbentglteringmaterial in the llower rportion of said container, a ,line ab-'sprbentltering medium..in the upper-,portion of said-,containen aIresilient washer 'tted lon ,said `tube ,immediately below, its,periora'tiona all@ an inverted frusta conical 1perforated member ittedon A`the.tube 'tol keep.. thenn'e ltering medium away.; 'from yandiprevent it from cloggi/ngl n the perforations ofthe tube,saidfrusto-conical member! being engaged at. its upperularger Lend',with

the under lside trof. .thelli'd and Yhaving its. lower end Y.pressed .bysaidllid dowlnon' .said .-w.a`sher.

l",f'..'2. Thelconstruction .dened ,inrclaiml where- -i'n thelidlis:screwed ,onto't the. .upper.end ,of [the tube, "said bottorcand. saidlid having .theircuter Vsurfaces ffressed .to i.form .tapered ,seats,about thelcentr'al openingstherepf `for. engagement IAwitlfl washers tose'al the ends of the tube with.,r ef spec-,tito the. central post ofa.ilter.casing iextended through-.Said tube, and tapered ,-.washersY*"s'ezijecl .inrsaidsevats .and.. engagng,.the opposite edsofsaidtube.i,1 ...i-.-

.an`oi1,lter, anups'tanding .cylindrical casing including a. cylindricalsidewalhand, top Vand bottomV walls,` said ,top 4vand .bottom l)wallshaving ,axial ,openings, Va verticalatubenimthe `casing and .ntted .intothe Y .openings, `.Asiaiciutube :hav-ing openings thereinbelow` vthetop-wall..of the ica-sing,awasherlonthetube below, thenpenings, :la.perforated@rustoeonical`4 member. sur- Y rnuediegthe tube grid.A:heilige ,its minor end yseated o n the washeryandmits .major .endseated .against the underside 9i-the teg- Walt e 00ers@ filtering'material Y filling the lower portion yogi.,r the 4 annular :space in-the itcasing below Ythe washer and surrounding the tube, relatively nerltering material overlying the coarse filtering material and lling theremainder of the annular space in the casing surrounding thefrustoconical memberrand the tube, the side wall of the casing havingopenings therein below the juncture of the filtering materials, wherebya dirty liquid may be forced into the casing through vthe lattermentioned,openings-and-thence pass upwardly in the casing; sequentiallythrough the coarse and relative ne filtering materials to be finallydischarged in a cleaned state into the tube upon passing through thefrusto-conical frnember and the openings in the tube.

4 In an oil lter, an upstanding cylindrical casing including acylindrical side wall and top and bottomwalls,.said top and bottom wallshaving axial openings, a vertical tube in the casing and tted into theopenings, said tube having openings therein below the top wall ofthecasing,

a -resilientwasher snugly Vi-tted on-the tube be- V low the openings, a-perforatedfrustoconical vupwardly in thecasing sequentiallythrouglfrthe Ycc arse and lrelative :fine filteringmaterials tog-beyfinally discharged in -a cleaned ,-state-intQ-the tube `V'upon Jpassingthrough-the jfrustofconical member andthe-openings in thetube: :r

THOMAS s. LAsKY.

fannnnnncnscirnn Y l 'The following lreferencesa're 'of :record intheleofcthis-patent:` f UNITED vSTATES PATENTS Y Number Name Y f 7""Date2,088,222 White c- July l27,--193'7 2,092,749 Bradshaw s 'Septfl 19372,110,318 Baruch e Mar. 18, 1938 l2,168,125 Hurn Aug. 1,1939 '2,201,418Williams let al, May 21, 1940 2,232,423 Allure` Y Feb, 18, 19941`2,325,657 Burkness Aug. .3,1943 2,487,146 Lasky Noi/.8,1949 2,522,975Voorhees Sept. 19,1950

2,543,481 `Wicks et 'a'.l. Feb. '27, l1951

